Living up to the reputation of the brand, GEARWRENCH full polish chrome sockets deliver unprecedented speed, strength, and access. These sockets feature an entry angle to guide fasteners in and offer serration depths as deep as fasteners. Large, hard-stamped markings allow for easy identification and the sockets can be easily recognized as SAE (double line) or metric (knurled line). Additionally, the Surface Drive® design puts force on the flats of fasteners for improved durability and reduced fastener rounding. The 80135D is a 1/4 In. drive 13 mm socket.